Your network contains an Active Directory domain named All domain controllers run Windows Server 2012 R2. In a remote site, a support technician installs a server named DC10 that runs Windows Server 2012 R2. DC10 is currently a member of a workgroup. You plan to promote DC10 to a read-only domain controller (RODC). You need to ensure that a user named Contoso\User1 can promote DC10 to a RODC in the domain. The solution must minimize the number of permissions assigned to User1. What should you do?

A. From Active Directory Administrative Center, pre-create an RODC computer account.
B. FromDsmgmt, run the local roles command.
C. Join DC10 to the domain. Modify the properties of the DC10 computer account.
D. Join DC10 to the domain. Run dsmod and specify the /server switch.
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